Source : Webster's Revised Unabridged Dictionary (1913)

Readable \Read"a*ble\, a.
   Such as can be read; legible; fit or suitable to be read;
   worth reading; interesting. -- {Read"a*ble*ness}, n. --
   {Read"a*bly}, adv,.

Source : WordNet®

readably
     adv : in a legible manner; "you must write legibly" [syn: {legibly},
            {decipherably}] [ant: {illegibly}]